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STR730FZ1T7 数据表(PDF) 33 Page - STMicroelectronics |
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STR730FZ1T7 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 53 page ![]() STR73xF Electrical parameters 33/53 RC/Backup Oscillator characteristics VDD = 5V ± 10%, TA = -40°C to TAmax, unless otherwise specified. Table 14. RC Oscillator Characteristics 1) CMU_RCCTL = 0x8 2) RC frequency shift versus average value (%) PLL Electrical Characteristics VDD = 5V ± 10%, TA = -40°C to TAmax, unless otherwise specified Table 15. PLL characteristics. Symbol Parameter Conditions Value Unit Min Typ Max fRC RC Frequency High Frequency mode 1) 2.35 MHz Low Frequency mode1) 29 kHz fRCHF RC High Frequency CMU_RCCTL = 0x0 3 MHz CMU_RCCTL = 0xF 2.3 MHz fRCLF RC Low Frequency CMU_RCCTL = 0x0 35 kHz CMU_RCCTL = 0xF 30 kHz fRCHFS 2) RC High Frequency stability Fixed CMU_RCCTL 10 % fRCLFS 2) RC Low Frequency stability Fixed CMU_RCCTL 23 % tRCSTUP RC Start-up Time Stable VDD, fRC = 2.35 MHz, TA = 25 oC 2.35 µs Symbol Parameter Conditions Value Unit Min Typ Max fPLLIN (1) 1. fPLLIN is obtained from fOSC directly or through an optional divider by 2. 2. Typical data are based on TA=25°C, VDD=5V 3. Max value is guaranteed by characterization, not tested in production. PLL reference clock FREF_RANGE = ‘0’ FREF_RANGE = ‘1’ 1.5 3.0 3.0 5.0 MHz fPLLOUT PLL output clock MX = ”00” MX = ”01” MX = ”10” MX = ”11” 20 x fPLLIN 12 x fPLLIN 28 x fPLLIN 16 x fPLLIN MHz fMCLK System clock DX = 1..7 fPLLOUT/DX 36 MHz fFREE (2) PLL free running frequency FREF_RANGE = ‘0’, MX0 = ’1’ FREF_RANGE = ‘0’, MX0 = ’0’ FREF_RANGE = ‘1’, MX0 = ’1’ FREF_RANGE = ‘1’, MX0 = ’0’ 120 240 240 480 kHz tLOCK (3) PLL lock time stable oscillator (fPLLIN = 4 MHz), stable VDD 100 300 µs ∆tPKJIT PLL jitter (pk to pk) fPLLIN = 4 MHz (pulse generator) 1.5 ns |
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